Cover support



Jam 1940- R. M. CRITCHFIELD ET AL ,7

COVER SUPPORT Filed Aug. 23, 1937 PatentedJant30,1940 g t 2,133,70;6,- I

s rM151 5 PAT NT [OFFICE 3 2,188,206 COVER SUPPORT Robert M. (lritchfield and Joe/White, Anderson, Ind., assignors to General Motors Corporation,

Detroit, Mich., a corporation of Delaware v Application August 23, 1937,-Serial-'No. 160,440

" 4 Glaims- (o1. 1774p This invention relates to means for support secured toge'therby the clamp screws I6. This ing storm covers, or caps, t hat enclose operative constructionprovides an oscillatable assembly, in- -mechanisms, and has for an object to provide a eluding the diaphragm I4, and may be recognized readily-removable cover support, that will peras conventional structure, known to those ex- ?5 mit easyaccess to the operative mechanism durperienced in the-art. H "5 ing assembly, and adjustment, and yet will ef- The centralportion of the base plate I0 may fact a rigid and non-displaceable coverage for be dished'or extruded to provide the protuberthe operative device. ance or elevated portion I8, upon which is usually It'is ,a further object of this. invention to promounted other pro-tuberant structure, in a form I :10. videcover supporting means that may be readof a motor orthe like, for actuation of the diaily attached to existing or conventional struc-' "'phragm I4. I Here, the protuberant structure in ture, without modification of any part thereof. cludes a magnet frame 20, carrying a Winding A further object of this invention is to provide 22 that may be included in the electrical circuit means-readily attachable to, and detachable from, of 1a selecting switch, for effecting magnetization '15 some protruding or overhanging part of a power I of the frame 2!}. The magnet frame 2|] complant for a sound signal device, that will securely prises a pile of E-shaped laminations, clamped.

support a storm cover. together'between a'pair of bracket members 24 It is afurther object'of this invention to proand '26,thro'ugh the agency of rivets 28, all of vide a storm cover support for a sound signal which is; the usual' construction. The bracket g device that maybe quickly and securely asmembers24-and26 each provide a shelf portion sembled therewith; such as by snapping over a or ledge30,and.32 respectively, extending out- .part of the magnet frame or other overhanging "wardly' from the laminations, and which shelf structures. i I portions are 'apertured, such as at 34 vfor re- Still. a further object of this invention is" to -ception of-a supporting stud 36 secured to the providea cover supporting bracket-that is enprotuberant base portion I8, in any desired mangageable with aledge or overhanging part availner. Cooperating nuts 38 and 49 on the studs able in conventionalstructure. I -36 above and below the shelf portion, operate Further objects'and advantages of the'present to firmly secure the shelf portions to the stud, I invention will be apparent from the following and effect adjustment of the magnet frameas to description,reference being had to the accomparallelism ,*and' spacing, relativeto the base 30 .panying. drawing wherein a preferred embodivplatea mentof the presentiinvention is clearly shown. "Anarmature 42 is mounted upon an armature In'the drawing: I rod 44 that passes through an aperture of the Fig.1 isa fragmentary view, with parts in magnetframe, and has one end thereof secured section; illustrating the preferred form of the to the diaphragmM by means of the clamp wash- 3'5 instant invention. t ers 46 .and 48, clamping the diaphragm upon a Fig. 2 .is a fragmentary view, in elevation, subreduced portion 50 of'the armature rod, by means .stantially as indicated by the line and arrows I ofalock washer andinutj-52. The opposite end 2.-;.-2 ,of Fig. 1.: i of the armature rod 44, after passing through Fig. 3 is a sectional view,"substantially as inthe' armature 42 where it'is rigidly secured, cardicated by the line and arrows 3-3 of Fig. 2. ries abutment devices-54, adapted toactuate a aFi'g. '4 is a plan view, with parts in. section,- circuit breaker member 56, all as is the usual substantially as indicated by the line and ar- .constructiori, it being understood that energiza- -r.ows44 of Figs-3. tion of the-winding 22 effects movement of the 4 I Figs. 5 and 6 are elevational, and bottom plan armature 42, that in turn actuates the diaviews, respectively, of the cover supporting brackphragm I4. i 8 a d 1, Y Astorm cover 60 is provided'for enclosing all .IFi'gii 'Z' is" a;- fragmentary view, illustrating a ofthe protuberant structure, and in this specific modification of the means for anchoring the instance comprisesasemi-spherical, or cup,like

5 cover supporting bracket to the base, or protumember whose edge portion 62 is adapted to emberant structure. brace the base plate Ill, and engage a ledge por- Referring p y. to th g, II] in tion 64 provided by the radial extension of the dicates a base plate of a sound signal device, collar member I2 beyond the peripheral edge that cooperates with a collar member I2 to clamp of the base plate I0. At some convenient and the peripheral edge of a diaphragm I4, when substantially central or apex portion of the cover, 55

his

an aperture is provided and the surrounding walls extruded as at 65, to provide a seat forthe' head of a retaining screw 68 that threads into the body of a bracket member 16 for securing the cover into position.

The bracket member here illustrated is in the form of a spring bow, a stirrup, a yoke, or a formedstrap of springy material, that has provisions ,for latching behind a ledge: or overhanging part of the existing protuberant structure.

Figs. 5 and 6 illustrate the preferred form of the cover bracket. Here the bracket 10 contemplates a bridge portion 12 extruded and tapped as at M for threaded reception of the retaining screw 68. Extending from bothlendsof the bridge 72,

there are inclined portions l6 diverging-outwardly, and whose terminating ends l8 are again bent inwardly so as to extend substantially parallel with each other, as well as. parallel with the axis of the screw receiving portion 14. The strap might be otherwise fashioned to provide the end portions 78, such as taking the form'of an are, a .U-shaped member, or a V-shaped member. Both of these end portionslil are deformed such as to form channel-like portions 80, or otherwise fabricated such as to provide the central web 52 along a central portion of the strap, with side Webs '84 deflected inwardly, or at least out of the plane of the Web 82, somewhat as i1- lustrated in Figs. 5 and 6. The deflected Webs or flanges M are notched as at 88, or the strap is provided with edge-entering notches or cutaway portions, which notches are substantially oppositely disposed, thus leaving a reduced portion or neck 88 joining the mutilated web portions 90 with the main body of the strap.-

The yoke i6 is of such dimensions and angular formation, that in its free state the'end portions 58 will spring inwardly to a dimension less than j that of the part or parts that it is designed to span. so that when the member is assembled substantially as illustrated in Figs. 1 and '7, it will be necessary to separate the arms or flex them outward against the inherent spring tension.

', According to the disclosure in Fig. l, the spring bow or yoke it snaps over and hooks behind a ledge or overhanging or'projecting part of the protuberant structure mounted on the base plate, which here is in the form-of the edge portions of the shelf members 39, 32, that provide the ledges 92 receivable within the notches 85 of thespring bow. It will be observed by reference to Figs.

1, 3 and 4 that the deflected portions Snare thence hooked behind or underneath the shelf portions, where they are retained by the spring tension within the strap "l0. 'When the screw 68 is threaded in the portion H! and tightened, it

will draw the cover into firm engagement-with the-parts, where it will be securely held. I 1

In the form illustrated in Fig. 7, the protuberant structure forming the ledge or overhanging part comprises a struck-out portion orextension $4 from the elevated portion E8 of the base plate,

, and which is adaptable to receive the deformed portion of the bracket '50, as is there clearly illustrated. 1 In the instance 'of either form of the sound signal structure, the same bracket is adapta'ble to be anchored to some ledge or overhanging part of the protuberant parts. In all instances the deflected web portions 90, in conjunction with the adjacent notches 86 make provision for securely anchoring the supporting strap. The operative assembly of the signal device maybe completely assembled, tested and adjusted before the bracket is affixed, or if service of the signal devices neces sitates subsequent adjustmentQ-of, ;the; magnet spacing, or repair of adjustmentQof the circuit.

breaker mechanism, and the like, the bracket may be quickly removed for that repair or re- I placement, and thus notbe in the way while mak-' When adjustment, replacement the claims which follow.

What is claimed is as follows:

1. In a sound signal device having a' baseplate, and 'a magnet motor including shelfpOrtiOnssupported by thebase plate in spacedrelation thereto, the combination comprising, a storm cover for enclosing the magnet'motor, and means for supporting the storm cover, comprising a supporting bracket, having'end portions of channel form and providedwithnotches forrece'iving the said shelf portionssaid bracket being spring urged to maintain the shelf portions and notches insealing relation, said bracket being adapted tocooperate with shelf portions which are approximately I straight.

2. In a sound signal device, a porting a cover, comprising in combination, a bowed strap member adapted to receive'a cover retaining screw, and having its ends notched at opposite'sides, and the notched portionsdeflected, from the body-of the strap, said notched and de- I flected portions being adapted to engage project bracket for suping approximately straight portions of the signal 3.!In a device having a base plate, a protuber ant structure mounted on thebase plate, andproviding ledges, each defined by an approximately.

straight edge, the combination "comprising, a storm cover cooperating with the'plate to enclose the protuberant structure, and means en- 5 gaging said edges of the protuberantstructure, supporting the cover rigidly in position; said means engaging the protuberant structure'com- :prising a yoke member of flat stock, and having its ends channeled and notched for engaging said ledges.

4. 'In a signal, having berant structure thereon includingv Ja'in'agnet frame, said magnet frame includingfibracket members secured in spaced relation with the base.

by the storm cover is securely, held in place ROBERT M. CRI'I'CHFIELD. h

JOE 'WHITE a base plate andrprotu Y plate and providing approximately. straight I I j ledges, the combinationcomprisinga storm-cover 5 for enclosing the protuberant' structure,a spring bow within the cover and hooked behindjithe ledges of the magnet frame, and means 'fo'r'QSecuring'the storm cover to the'spring bow where- 

